?? ???? ???? ???? ??? ???????? ??? ???? ??? ?? ????? ????? ?? ???? ? ???????Visualize a vehicle driving from the night time. The headlights only go a hundred or two hundred ft ahead, and you may make it each of the way from California to Ny driving with the dark, because all You need to see is the next two hundred toes.? ??? ????? ? ??????? ?? ?? ?